Search found 432 matches

by DogDipstick
Apr 04 2020 10:25am
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 2142
Views: 313682

Re: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)

these are not holmes nips, so the quality may be better?? (no negative product reviews from this ebay seller that I've seen so far) .. so did you measure your rim holes or not;) ?? They are good quality. Brass. I had bad nips at first from treatland.tv , galv. steel.. galled, never tension, pull ht...
by DogDipstick
Apr 03 2020 9:56am
Forum: Battery Technology
Topic: What would happen in this scenario?
Replies: 10
Views: 217

Re: What would happen in this scenario?

Junk lipos cells puff easy on hard hot discharges. Depends on the quality and how hard you hit them. Ive puffed lipos believe me.... that and the hitting LVC constantly make you bonkers.
by DogDipstick
Apr 01 2020 3:58pm
Forum: E-Bike General Discussion
Topic: Cheapest high torque fast bike?
Replies: 20
Views: 358

Re: Cheapest high torque fast bike?

Yeah I do admit after a while you must give a hub motor a rest ( when off road. ) . A Bafang mid drive or some similar mid drive will chug along all day, albeit a little slower than you may like.... on the "30A 14s" config goal. Hub motor tries really hard and uses loads of fun power. You need serio...
by DogDipstick
Apr 01 2020 4:22am
Forum: E-Bike Technical
Topic: Rear Dropout Torque Sensor
Replies: 7
Views: 120

Re: Rear Dropout Torque Sensor

Looks like a Sonders style Tq sensor? IDK thou I dont have a Sonders just have seen pics of them.
by DogDipstick
Mar 31 2020 12:57pm
Forum: E-Bike Technical
Topic: Rohloff & other IGH at high power - measuring & limiting torque?
Replies: 12
Views: 300

Re: Rohloff & other IGH at high power - measuring & limiting torque?

> You could use a (extra) bottom bracket Torque sensor with a known dummy load to know the tourqe output of your drive at any time I don't know the different types, but thought those were for measuring human pedal power? Tq sensors measure ( shaft) Tq, not human pedal power. They only measure human...
by DogDipstick
Mar 31 2020 11:31am
Forum: E-Bike Technical
Topic: Rohloff & other IGH at high power - measuring & limiting torque?
Replies: 12
Views: 300

Re: Rohloff & other IGH at high power - measuring & limiting torque?

I do **not** want to size a motor so its max peak output is not capable of breaking the IGH. I want a motor that can output continuous power way higher than that and then use controls to keep that output below the IGH breaking point. So most of the time in normal use, the rig is only using say 20-4...
by DogDipstick
Mar 31 2020 3:40am
Forum: E-Bike Technical
Topic: Rohloff & other IGH at high power - measuring & limiting torque?
Replies: 12
Views: 300

Re: Rohloff & other IGH at high power - measuring & limiting torque?

I am just describing the relationship of gears / power / work. How it applies to the limiting ( of tq) to not break the (IGH) hub. Classically, the 1:1 ratio is the strongest in the IGH. Underdrive is one mode and overdrive is the other ( in the acquisition of speed and acceleration, manipulation of...
by DogDipstick
Mar 31 2020 1:46am
Forum: E-Bike Technical
Topic: Rohloff & other IGH at high power - measuring & limiting torque?
Replies: 12
Views: 300

Re: Rohloff & other IGH at high power - measuring & limiting torque?

I believe wrt abiding a high torque power train, nothing beats the 14-gear Rohloff Speedhub at a 526% range, rated for 130 N.m If it turns out that more than 130 N.m is required for my use case, could one of those, as right-hand chain drive, be configured to "bypass" the IGH to power the rear wheel...
by DogDipstick
Mar 30 2020 1:44pm
Forum: E-Bike General Discussion
Topic: Cheapest high torque fast bike?
Replies: 20
Views: 358

Re: Cheapest high torque fast bike?

Don't you think you could get it for less than that? 1000w kit for $160, ( I paid 200 shipped ) homemade 18650 battery/hobbyking battery $200 ( that is what I paid ) , controller $100? ( I paid 70 $) I would rather not go with another motor as this is supposed to be as cheap as possible, the 3000w ...
by DogDipstick
Mar 30 2020 12:04pm
Forum: E-Bike General Discussion
Topic: Cheapest high torque fast bike?
Replies: 20
Views: 358

Re: Cheapest high torque fast bike?

I kind of just did the whole template that dogman did. Got an excellent 40 mile per hour bike for about $1,300.... excellent name brand and all high-end but I bought most of my stuff used for cheap and there was a lot of do-it-yourself. if you know what you're looking for you can build a really powe...
by DogDipstick
Mar 30 2020 12:02pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1998 KX 250 Dirtbike?
Replies: 10
Views: 151

Re: 1998 KX 250 Dirtbike?

efMX Trials Electric Freeride wrote:
Mar 30 2020 11:54am
what if you had (or preferred) to buy the battery or have one professionally built.. how would that change your build estimate $$$??
Oh yeah for a well-designed reputable manufacturer large pack with warranty and customer service... 2 to $3,000 just for the battery LOL.
by DogDipstick
Mar 30 2020 10:33am
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1998 KX 250 Dirtbike?
Replies: 10
Views: 151

Re: 1998 KX 250 Dirtbike?

have you looked at battery prices?. just the battery would likely cost around $1-3K +.. I could build a suitable battery myself for 300-500$... I think. I do not think battery cost should bring anybody off the possibility. these days it's cheaper to buy new than build .. such as Surron electric dir...
by DogDipstick
Mar 29 2020 5:51pm
Forum: Motor Technology
Topic: The person who has been running higher power through hubmotors than anyone here doesn't use Ferro Fluid
Replies: 18
Views: 639

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

Instead it reall boils down to heat created in the copper vs an estimate of the heat my motors can dissipate at a given temperature. I have much lower temperature tolerance than I see other reporting, and the surface area of my motor shell is smaller, so I'm obviously not making as much heat. That'...
by DogDipstick
Mar 29 2020 1:07pm
Forum: Motor Technology
Topic: The person who has been running higher power through hubmotors than anyone here doesn't use Ferro Fluid
Replies: 18
Views: 639

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

a flip forward Aha. We called that an "Endo" here in the United States once upon a time, I think, a long time ago... Thankyou. Here I am, fearing the old 'endo"... Lol. I have a pack slung under the down tube and fear rubbing. I used to take my BMX on half pipes and similar. Back when I was much yo...
by DogDipstick
Mar 29 2020 9:55am
Forum: Motor Technology
Topic: The person who has been running higher power through hubmotors than anyone here doesn't use Ferro Fluid
Replies: 18
Views: 639

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

... and with such lightweight frame there is even the risk that you make a salto forward if you ride a bit faster over pot holes or curbs, simple for the reason that there is almost no difference between sprung and unsprung mass. Might I ask, what is a "salto"? My frame is light, and rather well ba...
by DogDipstick
Mar 29 2020 9:25am
Forum: Motor Technology
Topic: The person who has been running higher power through hubmotors than anyone here doesn't use Ferro Fluid
Replies: 18
Views: 639

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

I have a Grin Analogger that I've yet to use. Just like I have a mountain of front/rear unprocessed videos from when I was commuting 40-50km/day depending on route, I'd pile up data files if I logged rides. Did you measure the original Kv of your motor, so you can know if you've done permanent dama...
by DogDipstick
Mar 28 2020 10:48am
Forum: Items Wanted
Topic: wheel lace
Replies: 9
Views: 334

Re: wheel lace

Yojimbos Garage on eBay cuts 12 gauge for ya cheap and good. Plus has moped nipples if you need.

http://www.yojimbosgarage.com/blog/
by DogDipstick
Mar 28 2020 9:27am
Forum: Battery Technology
Topic: Do you think the spec is accurate?
Replies: 2
Views: 109

Re: Do you think the spec is accurate?

I'd rather have 200$ worth of recycled EV cells. Cut and paste.. Build it myself. That is just me, though. If you trust the source... and ect..... A123 20Ah LifePo pouch ( for those that dont want to Klick on the link) 12pc., $339.11 USD. ~64 Wh ea. ..768 Wh total.... I can buy 2,225Wh for 350$ in r...
by DogDipstick
Mar 28 2020 8:02am
Forum: Motor Technology
Topic: The person who has been running higher power through hubmotors than anyone here doesn't use Ferro Fluid
Replies: 18
Views: 639

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

Based on the 150-160°C motor temps I see some talk about (I use a 100°C limit), So.. how much is just a claim and how much is honest overcurrent heating? Noone knows. I got the 180 deg rollback..... Hit her often.... How long do I have, John? My spec is 112A for the lil motor I have, ( phase, publi...
by DogDipstick
Mar 28 2020 7:06am
Forum: Items for Sale - Used
Topic: CA3 DPS or NOT: (BOTH SOLD) (OBO): BOSCHE and (SOLD)
Replies: 2
Views: 371

Re: Cycle Analyst V3 DPS or NOT: NEW 80$ (OBO): BOSCHE and TCDM

PICS Both Ca3 SOLD. MORE THROTTLE AND PIGTAIL PICS ADDED THERE IS ALSO A KINGMETER CABLE CUTOFF SENDER THERE ( for shifting or cable brakes... ) Silver Body with small red led.. and pigtail. I also have a Grin thumb throttle somewhere.. lil guy with a Molex on it. Like I said, I can change the pins ...
by DogDipstick
Mar 27 2020 4:11pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Off-road ebike swing arm setups
Replies: 11
Views: 744

Re: Off-road ebike swing arm setups

Heres some quickies. See me beating on this thing at the end of my driveway... Welded by an amateur. 750 miles of this so far. Someday I'll do some jumps too and more beating when I get the time and helmet. Lol. More burnouts and linelocks. https://www.youtube.com/watch?v=dsCfXrr3jxw ...name's Midni...
by DogDipstick
Mar 27 2020 11:33am
Forum: E-Bike Technical
Topic: Is this a QS 205 motor?
Replies: 14
Views: 274

Re: Is this a QS 205 motor?

IDK anything more.

Motor in question.... :
by DogDipstick
Mar 27 2020 11:16am
Forum: E-Bike Technical
Topic: Is this a QS 205 motor?
Replies: 14
Views: 274

Re: Is this a QS 205 motor?

IDK. I will tell you this: Yes, the "Font" looks correct.. for a 2018-19 era QS ( that mine is) .... And.... The wires, double nut, axle, and nuts color are typical of a QS205.... Dual hall and the correct yellow and white connectors... .. and Yes... I have heard of QS selling to marketers, without ...